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Looking for pipe eq. mount plans

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#1 2696

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Posted 13 August 2019 - 03:28 PM

I'm dipping my toe into the ATM and DIY aspect of this hobby, and I want to make a mount for an older 60mm refractor I have. Since I don't have access to a shop or any real machinery, I decided a pipe fitting mount would be the best option. I've been looking around at mounts people have made with the same materials but not a lot of them have plans along with them. If you have made one or have seen plans for one anywhere, please post them here! I know for the most part what I'm going to need but it's always nice to see everyone's take on it. Thank you!

#2 DAVIDG

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Posted 13 August 2019 - 04:30 PM

 See my article in the Nov. 2012 Sky and Telescope about the Delmarva Pipe Mount I designed that requires no machining. Also  see some discussion of in this thread https://www.cloudyni...our-pipe-mount/

  Here is another article about it  the author used some machine tools but as my article explains they are not needed, only simple hand tools https://somanyhobbie...l-mount-part-3/

 

            - Dave 


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#3 luxo II

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Posted 14 August 2019 - 12:55 AM

The first question I’d ask is why equatorial ? If this is for visual I’d suggest stick to altaz. If it’s for imaging I wouldn’t go the DIY route - buy a mount.

Photos of two interesting examples appear in this thread

https://www.cloudyni...george-t-keene/

Don’t think you will find plans... these are built to fit your OTA. Having built some mounts before I found the real challenge was more how to drive it (I wanted tracking).

Edited by luxo II, 14 August 2019 - 12:59 AM.

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#4 clearwaterdave

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Posted 14 August 2019 - 08:30 AM

As stated above.,why Eq.,going with alt/az is much simpler.,here is my 70mm and 100mm both.,1"pipe.,pm me if you have questions.,cheers

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#5 2696

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Posted 14 August 2019 - 10:46 AM

The first question I’d ask is why equatorial ? If this is for visual I’d suggest stick to altaz. If it’s for imaging I wouldn’t go the DIY route - buy a mount.

Photos of two interesting examples appear in this thread

https://www.cloudyni...george-t-keene/

Don’t think you will find plans... these are built to fit your OTA. Having built some mounts before I found the real challenge was more how to drive it (I wanted tracking).


I'm not looking to do anything more than visual with this mount, it's just a little more ideal that it's equitorial in my mind. But regardless I'll end up making an alt/az mount too.

#6 Garyth64

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Posted 14 August 2019 - 12:59 PM

I like using EQ mounts for all my scopes, even little 60mm.  I don't like having to make two adjustments to keep an object centered, especially if I bump the power up.  I  have slowly gotten rid of all the alt-az mounts that I did have.

I had a Unitron alt az mount, and although the controls were nice, I just didn't care for it.  Even the alt-az for my Shrine Manon I sold off.  So for me, it's just a personal preference.  Many people do like the alt-az mounts.


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#7 EJN

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Posted 14 August 2019 - 01:54 PM

If you can find a copy of Sam Brown's "All About Telescopes" there are many pipe mount designs, both turn-on-threads types and ones requiring machining. Both AZ and EQ.
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#8 Pinbout

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Posted 14 August 2019 - 03:35 PM

https://3dwarehouse....af4/alt-az-head

 

not a pipe mount but much lighter... pipe mounts are pretty heavy. grin.gif

 

Ramapo-20130227-00212.jpg

 

mount method.jpg

 

inside.JPG

 

laminated surface II.JPG

 

 


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#9 Pinbout

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Posted 14 August 2019 - 03:43 PM

my televue  and binos on the mount

 

black box 2.jpg


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#10 2696

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Posted 14 August 2019 - 04:16 PM

my televue and binos on the mount

black box 2.jpg


That's a very nice design for an Alt/Az mount! Simple but it looks pretty sturdy. How has it been treating you?

#11 Pinbout

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Posted 14 August 2019 - 10:08 PM

It’s fine... especially for a small refractor. That televue isn’t very light and the head has no problem 


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#12 Diego

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Posted 15 August 2019 - 06:54 AM

It’s fine... especially for a small refractor. That televue isn’t very light and the head has no problem


Nice design! Is the wing nut to prevent it from unscrewing? I see that the bolt threads both in the T Nut & the wing nut.
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#13 Pinbout

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Posted 15 August 2019 - 07:35 AM

si, I like the wingnut cause its tooless… although I need a screwgun to get to it. grin.gif


Edited by Pinbout, 15 August 2019 - 07:39 AM.

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#14 geovermont

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Posted 15 August 2019 - 07:51 AM

To get back to the original question: Here's a link to Dave Trott's site on how to improve low-cost scopes, including very practical mountings: http://davetrott.com...heap-telescope/ . The Sam Brown book has some great ideas and I treasure mine, but the designs in Richard Berry's "How to Make a Telescope" are better. My experience in building simple altazimuth and equatorial mountings suggests that an undriven equatorial isn't really much help. An altazimuth with smooth motion on both axes can be steadily tracked with one hand, and that's what you are looking for. Ross Sackett summarizes the principles of good telescope mount design at: http://stardazed.com...nginnering.html . That's the best set of design principles for telescopes that I have ever seen. Read those over and over until they make sense. And don't be put off by the lack of lots of tools and a fancy shop. Simple wooden mountings can work extremely well (with the classic Dobsonian designs being the prime example and Richard Berry's refractor mounting being the logical follow-up). Most of all though, just try something and have fun.



#15 Pinbout

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Posted 15 August 2019 - 07:56 AM

That's a very nice design for an Alt/Az mount! Simple but it looks pretty sturdy. How has it been treating you?

and now for something completely different... the lark... I mean my black box on the moon

 

you can see how it handles at somewhat high mag with a heavier scope than yours and that long optical train sticking out of that weak focuser...

 

you can see the dampening time after I move it around... realize I'm watching the silly screen on the camcorder instead placing my eye on the eyepiece... shocked.gif

 

https://www.youtube....h?v=2Ut_X3nL3IU


Edited by Pinbout, 15 August 2019 - 07:58 AM.


#16 Garyth64

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Posted 15 August 2019 - 09:02 AM

 2696 asked about pipe mount plans.

 

 

pipe mount plans.jpg


Edited by Garyth64, 15 August 2019 - 09:16 AM.

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#17 2696

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Posted 15 August 2019 - 10:16 AM

2696 asked about pipe mount plans.


pipe mount plans.jpg


Thank you! Those are great, what are they from?

#18 DAVIDG

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Posted 15 August 2019 - 11:16 AM

  The Sam Brown plans are great but they have the issue of the machining  of the reducers to make them into the bearings and also machining the pipe that goes thru them as the Dec and RA shaft. That is were my Delmarva design comes in. It fixes that problem and requires no machining, yet you have a  system that you make with hand tools and is easily adjustable for friction,  play and allows 360 degrees of rotation without any change in friction or play. If you use pipe thread as the bearing surface, as with a simpler pipe mount  it tightens in one direction of rotation and will loosen in others so the amount of friction and play changes. You also can't easily add slow motion or a clock drive because the shafts can't rotate through 360 degrees continuously.

 

                    - Dave 


Edited by DAVIDG, 15 August 2019 - 11:17 AM.

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#19 Garyth64

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Posted 15 August 2019 - 12:05 PM

Thank you! Those are great, what are they from?

The little booklet by Sam Brown is called "Homebuilt Telescopes", No. 9066, in 1964.  I've had it since then.

 

I started to make one using 2-1/2" pipe.  It would house 1-1/2" shafts in brass bushings.  I stopped working on it because it was getting too heavy.

 

pipe mount.jpg

 

 

But back in '65, I made a simple one by just using 2" pipe.  After lapping the threads it was pretty smooth, and had enough friction to stay in place.  I used it on my 6" f/10 for many years.  I used only one tee, not like the 2 shown in the photo.


Edited by Garyth64, 15 August 2019 - 12:16 PM.


#20 EJN

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Posted 15 August 2019 - 12:15 PM

Those plans are included in " All About Telescopes" too, which just combined Sam Brown's mini-books into one larger book.


Edited by EJN, 15 August 2019 - 09:53 PM.

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#21 Pinbout

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Posted 15 August 2019 - 05:39 PM

My Delmarva pipe mount 1-1/2” t, with pvc stepdown bushings drill out and cut to create friction, with 1/8” thick Teflon to support 1” pipe

 

still kept bottom lapped 

 

or it it may be 3/4” pipe cause I wanted to use workout weights, that use a 1” hole, as a counterweight if needed

 

0F27A47F-F2F6-4D91-B5B5-BFA0E00846BE.jpeg


Edited by Pinbout, 15 August 2019 - 07:22 PM.


#22 clearwaterdave

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Posted 15 August 2019 - 11:43 PM

I made this mount after doing a bino mount.,I wanted to be able to have the eyepiece at the same height no matter what alt. I was observing.,It has worked great.,no more adjusting the chair or kneeling to view at the zenith.,I have had it for a year now.,and find the regular type of Alt/Az mount tiresome to spend a whole night with.,gotta love it when things just work.,

  

Frank an little Frankie.,

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